US PATENT SUBCLASS 123 / 356
.~.~.~.~ Circuit resonates (e.g., tuned) at governed speed

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


123 /   HD   INTERNAL-COMBUSTION ENGINES

319  DF  ENGINE SPEED REGULATOR {16}
349  DF  .~ Having condition responsive means with engine being part of a closed feedback system (e.g., cruise control) {4}
350  DF  .~.~ Electrical sensing or regulating {3}
352  DF  .~.~.~ Engine speed sensing having an error signal producing circuit {7}
356.~.~.~.~ Circuit resonates (e.g., tuned) at governed speed

DEFINITION

Classification: 123/356

Circuit resonates (e.g., tuned) at governed speed:

(under subclass 352) Subject matter in which the error signal producing circuit has means to compare the actual engine speed to the desired engine speed and contains means to tune the circuit so that the circuit resonates or oscillates, producing no error signal output when the speeds compared are the same.